CN1134628C - Apparatus for cooling power electronic device of driving device of refragerating compressor - Google Patents

Apparatus for cooling power electronic device of driving device of refragerating compressor Download PDF

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Publication number
CN1134628C
CN1134628C CNB001043145A CN00104314A CN1134628C CN 1134628 C CN1134628 C CN 1134628C CN B001043145 A CNB001043145 A CN B001043145A CN 00104314 A CN00104314 A CN 00104314A CN 1134628 C CN1134628 C CN 1134628C
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CN
China
Prior art keywords
fin
temperature
compressor
electronic device
cold
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Expired - Fee Related
Application number
CNB001043145A
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Chinese (zh)
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CN1266978A (en
Inventor
P・A・利斯博阿拉莫斯
迈克尔·A·斯塔克
钡滤沟滤魅
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Carrier Corp
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Carrier Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor

Abstract

Apparatus for cooling the power electronics components of a variable frequency drive for the motor of a refrigerant system compressor. The components are mounted upon a heat sink and refrigerant from the system condenser is passed through the heat sink by means of a flow line and returned to the low pressure side of the system. A control valve is mounted in the flow line which throttles refrigerant passing through the line to produce cooling of the heat sink to maintain the temperature of the components within a desired range.

Description

The method and apparatus of drive electronic device in order to the device of cooling frequency conversion drive
The present invention relates to method and apparatus in order to the electronic device of the cooling frequency-conversion drive apparatus relevant with refrigeration compressor.
The compressor of use in many refrigeration systems need carry out tight control to the electromotor velocity of compressor usually, under the loading condiction that changes this system is remained in the limited range that needs.Therefore compressor is equipped with frequency-conversion drive apparatus (VFD), and frequency-conversion drive apparatus includes the drive electronic device of igbt form, and this electronic device may be overheated, therefore needs cooling.Cooling, common receptible method being provided for these electronic devices is that transistor is installed on the fin, and by the inner or coolant that circulates on every side at fin, thereby heat is taken away from fin.The performance of fin and cooling system has become the principal element of decision VFD capacity.
The form of the bulk material that fin is normally relatively large, it has good heat conduction and thermal inertia performance.One circulation passage is formed in the block, and coolant is by this channel cycle, and it has absorbed too much heat and has taken it out of system.
Water cools off the method that the VFD fin has been proved to be to cool off the transistorized a kind of satisfaction of VFD, and still, water cooling is difficult to control, and heatsink temperature exceeds the range of operation of needs sometimes.The running that this can produce the overheated of VFD electronic device again and hinder refrigeration system.In addition, the water cooling loop needs extra water management member, for example water pump, heat exchanger and heat need be sent to this type of device of external environment condition from transistor.This type of cooling device is generally comparatively complicated, cost is high and need very big installing space.
Therefore a basic purpose of the present invention is to improve refrigeration system, and a kind of method and apparatus of the drive electronic device in order to the cooling frequency-conversion drive apparatus is provided.
The solution of above-mentioned purpose aspect method is, the method of the drive electronic device of this a kind of cooling frequency-conversion drive apparatus (VFD), wherein said frequency-conversion drive apparatus is in order to control the motor of the compressor in the refrigeration system, it is characterized in that: the drive electronic device of VFD is mounted to a fin has thermally conductive relation, make from the cold-producing medium and the fin of refrigerant condenser output and have thermally conductive relation, to be expanded from the cold-producing medium of condenser output, make its pressure drop to a low pressure, so that heatsink temperature remains within the scope that needs.
The technical scheme of above-mentioned purpose aspect equipment is this cooling device that is used for the drive electronic device of frequency-conversion drive apparatus, wherein said frequency-conversion drive apparatus is in order to control the motor of the compressor in the refrigeration system, it is characterized in that: a refrigeration system, this system also has a compressor that is connected in series by refrigeration pipe, one condenser and an evaporimeter reach an expander that is adjusted in the cold-producing medium that flows between condenser and the evaporimeter in one of them described refrigeration pipe, be connected the frequency-conversion drive apparatus on the motor of compressor, described drive unit includes the drive electronic device of needs cooling, make the part of cold-producing medium branch to a loop of suction port of compressor from the system condensing device, be installed in a frequency conversion drive evaporimeter in the described loop, there is thermally conductive relation in the electronic device of described evaporimeter and described frequency-conversion drive apparatus; Control valve in the described loop, described control valve be in order to the swell refrigeration agent, makes it reach the pressure at place, suction port of compressor by described loop from the pressure of system condensing device, cools off described electronic device thus.
In order to understand these and other purposes of the present invention better, in conjunction with the accompanying drawings, referring to following detailed description of the present invention, in the accompanying drawings:
Fig. 1 is the schematic diagram in conjunction with a refrigeration system of the present invention;
Fig. 2 relate to further embodiment of this invention with the similar schematic diagram of Fig. 1;
Fig. 3 remains the schematic diagram that relates to further embodiment of this invention;
Fig. 4 is the schematic diagram of another embodiment of the present invention; And
Fig. 5 is the side view that is suitable for using after the amplification of the temperature expansion control valve in the present invention's practice.
At first referring to Fig. 1, it has schematically illustrated a refrigeration system that indicates with 10, and this system has utilized the Kano kind of refrigeration cycle, and this circulation has a series of refrigeration pipes 12 that are operably connected on the various components of a system.This system also has a condenser 13 that is connected to a compressor 15 outlet sides by a refrigeration pipe 12.And this condenser is in series with an evaporimeter 17, and the outlet of evaporimeter 17 is connected to the entrance side of this compressor by means of a refrigeration pipe, to finish the loop of this system.One expander 20 is installed on the refrigeration pipe between condenser and the evaporimeter, and it will make it become low-temp low-pressure by expansion from the high-pressure refrigerant that condenser comes out.Expander can be any in this type of device, for example well known in the art and the choke valve or the capillary that use.
The material that need cool off is flowed through the evaporimeter of heat transfer relation is arranged with low-temperature refrigerant.The cold-producing medium that has absorbed heat in cooling procedure is evaporated under a quite low pressure, and then refrigerant vapour is sent to the suction port of compressor, to circulate once more by this system.
The motor of this compressor is equipped with the frequency-conversion drive apparatus (VFD) 25 of control engine speed.This device is shown in broken lines in Fig. 1.Well-known in this field, VFD generally accommodates the drive electronic device that needs cooling, so that drive unit can operate under the optimal conditions in this system's range of operation.In practice, the electronic device that needs cooling normally among the figure with 27 igbts that schematically illustrate (IGBT).As mentioned above, so far this electronic device by with it and a fin is placed to heat transfer relation and recirculated cooling water cools off.This type of cooling system is quite complicated, needs bigger space, and is difficult to control.
As shown in Figure 1, the electronic device of VFD is directly installed on the fin 30, and fin 30 has formed the part at this said VFD evaporimeter 29.This fin is with the bulk material structure with high coefficient of thermal conductivity, so the heat energy that this electronic device produced is transferred away fast and is drawn in the fin.One internal fluid passageways 32 is installed in this bulk material.This passage passes through this bulk material along a crooked route, so that contact-making surface maximum between passage and the fin to be provided.In practice, this circulation passage can be one section copper pipe or the analog that embeds in the fin, and it has an inlet 33 and one outlet 34.
The inlet 33 of internal fluid passageways is connected on the refrigerant outlet 35 of this system condensing device by a supply pipe 36.And the outlet of this circulation passage is connected on the suction port of compressor by a delivery pipe 39.Be contained in the supply pipe with 40 control valves that indicate, by control valve, cold-producing medium is adjusted to a lower pressure from higher condenser pressure, provides refrigerant of low temperature to cool off this electronic device to fin thus.
The details of control valve 40 is illustrated among Fig. 5.This valve has a detecting head 42 that embeds in the fin, and detecting head 42 is as much as possible near this electronic device, to measure running temperature best.This valve can be a temperature-sensing valve that can respond to the temperature that detecting head is responded to, or can change a temperature expansion valve that responds to the pressure at the detecting head place that variations in temperature caused in the fin.In the present embodiment, this valve is a temperature expansion valve, and it has a diaphragm 43 that is installed in housing 44 inside.According to the temperature of fin, the pressure of spherical gauge head changes to some extent, has set the pressure on the phrenic upside cavity 45 thereupon.Pressure on the diaphragm downside cavity 46 is decided by a default adjustable springs 47 and an equal pressure side mouth 49, and equal pressure side mouth 49 extends between the low-pressure side of the low-pressure side of cavity and valve body 50.The phrenic pressure balance of crossing this valve is positioned in the valve passage valve body, and control offers the amount of cooling water of fin thus.Preferably, the temperature of fin is controlled in 90 to 140 the scope.
Open the fin that has internal fluid passageways can be used as the refrigerant evaporator that is used for VFD as can be seen from above, provides the cooling of strict control by utilizing kind of refrigeration cycle to electronic device, to remove heat from VFD.As can be seen, the heat that is delivered to cold-producing medium in the VFD evaporimeter is conducted to the condenser of this system by the compressor of this system, and there, heat is discharged in the condenser cooling circuit.
What Fig. 2 described is another embodiment of the present invention, and wherein identical member indicates with label identical among Fig. 1.In this embodiment of the present invention, the delivery pipe 39 of VFD evaporimeter is connected in the system evaporator 17, and combines with cold-producing medium that this evaporimeter of flowing through is handled.Shown valve detecting head 42 is installed on the delivery pipe of VFD evaporimeter, rather than is embedded in the fin.This detecting head feeds back to control valve 40 with temperature information, and control valve 40 is set the position of valve body according to the refrigerant temperature of being responded to, thereby the temperature of fin is remained within the range of operation of cooling electronic device needs.
Now referring to Fig. 3, the shown another embodiment of the present invention that remains, wherein identical label is used for indicating and above identical member once more.In this another embodiment of the present invention, control valve 40 is installed in the delivery pipe of VFD evaporimeter 29, and in the case, control valve 40 directly is connected the place, suction port of compressor.But as mentioned above, delivery pipe also can directly be connected in this system.Temperature detecting head 42 embeds in the fin 30 of VFD evaporimeter, and provides relevant temperature information to control valve.Generally the temperature of the cold-producing medium that comes out from the system condensing device is lower than 140 °F, therefore divides the cold-producing medium that flows into the VFD evaporimeter to be in well within the required heatsink temperature scope of cooling electronic device.
The another embodiment of the present invention that remains shown in Figure 4, wherein identical label is used for indicating and above identical member once more.In this embodiment of the present invention, the part of the cold-producing medium that comes out from the system condensing device expands by temperature-sensing valve 40 and enters the VFD evaporimeter 29.Temperature detecting head 42 still is embedded in the fin 30, and gives microprocessor 50 associated temperature information, and microprocessor 50 is composed of the program of deal with data, and sends control signal to control valve.The other system relevant information also can be given microprocessor, reaches the valve setting value that needs again after microprocessor processes, to provide cooling to electronic device under the condition of overall system performance consumption minimum.
From above open susceptible of proof, the present invention is a kind of simple and effective solution that the drive electronic device to the frequency-conversion drive apparatus of refrigeration compressor is cooled off.Native system has been eliminated the complexity of traditional water cooling system, and is easy to install, and more can control cooling procedure.Because its validity, native system allow using more widely of the electronic device bigger than those the device capacity of current use in the prior art in the compressor drive apparatus of a refrigeration system.

Claims (16)

1. the method for drive electronic device of a cooling frequency-conversion drive apparatus (VFD), described frequency-conversion drive apparatus is characterized in that in order to control the motor of the compressor in the refrigeration system:
The drive electronic device of VFD be mounted to a fin have thermally conductive relation,
Make from the cold-producing medium and the fin of refrigerant condenser output to have thermally conductive relation,
To be expanded from the cold-producing medium of condenser output, make its pressure drop to a low pressure, so that heatsink temperature remains within the scope that needs.
2. the method for claim 1 is characterized in that further comprising the steps of: make the cold-producing medium that comes out from described fin enter into the inlet of system compresses machine.
3. the method for claim 1 is characterized in that further comprising the steps of: make the cold-producing medium that comes out from described fin enter into system evaporator.
4. the method for claim 1 is characterized in that further comprising the steps of: making before described cold-producing medium and described fin have thermally conductive relation, make described cold-producing medium by a control valve, thereby make its expansion.
5. method as claimed in claim 4 is characterized in that further comprising the steps of: respond to the temperature of described fin, and locate described control valve according to the described temperature of sensing.
6. method as claimed in claim 4, it is characterized in that further comprising the steps of: the temperature of responding to described fin, the temperature data of sensing is offered a microprocessor to be handled, described microprocessor provides an output signal for described control valve, remains within the scope that needs with the temperature with described fin.
7. one kind is used to implement the cooling device of method according to claim 1, and described frequency-conversion drive apparatus is characterized in that in order to control the motor of the compressor in the refrigeration system:
One refrigeration system, this system also have a compressor, a condenser and an evaporimeter that is connected in series by refrigeration pipe and be adjusted in an expander of the cold-producing medium that flows between condenser and the evaporimeter in one of them described refrigeration pipes,
Be connected the frequency-conversion drive apparatus on the motor of compressor, described drive unit includes the drive electronic device of needs cooling,
A part that makes cold-producing medium branches to a loop of suction port of compressor from the system condensing device,
Be installed in a frequency conversion drive evaporimeter in the described loop, there is thermally conductive relation in the electronic device of described evaporimeter and described frequency-conversion drive apparatus;
Control valve in the described loop, described control valve be in order to the swell refrigeration agent, makes it reach the pressure at place, suction port of compressor by described loop from the pressure of system condensing device, cools off described electronic device thus.
8. equipment as claimed in claim 7, it is characterized in that, described frequency conversion drive evaporimeter has a fin, described fin is made with the bulk material with high coefficient of thermal conductivity, described circulation passage passes described bulk material, wherein, described drive electronic device and described fin are mounted to and have thermally conductive relation.
9. equipment as claimed in claim 7 is characterized in that, also has a temperature detecting head, and described detecting head provides relevant heatsink temperature information for described valve, thus the temperature sensed of described response valve and open or closed.
10. equipment as claimed in claim 9 is characterized in that, described temperature detecting head embedding response is in described fin.
11. equipment as claimed in claim 9 is characterized in that, described detecting head is installed in the downstream of the fin in the described flow cycle.
12. equipment as claimed in claim 8 is characterized in that, described control valve is a temperature expansion valve, and has and can one temperature detecting head of pressure information is provided for described valve according to the temperature of fin.
13. equipment as claimed in claim 12 is characterized in that, described detecting head is embedded in the described fin.
14. equipment as claimed in claim 8 is characterized in that, described control valve is positioned at the upstream side of described fin.
15. equipment as claimed in claim 8 is characterized in that, described control valve is positioned at the downstream of described fin.
16. equipment as claimed in claim 9, it is characterized in that, also have a microprocessor, this microprocessor is set to accept the input data of described detecting head and an output control signal is provided for described valve, heatsink temperature is remained within the temperature range that needs.
CNB001043145A 1999-03-15 2000-03-15 Apparatus for cooling power electronic device of driving device of refragerating compressor Expired - Fee Related CN1134628C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/268,573 1999-03-15
US09/268,573 US6116040A (en) 1999-03-15 1999-03-15 Apparatus for cooling the power electronics of a refrigeration compressor drive
US09/268573 1999-03-15

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Publication Number Publication Date
CN1266978A CN1266978A (en) 2000-09-20
CN1134628C true CN1134628C (en) 2004-01-14

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US (1) US6116040A (en)
EP (1) EP1037001B1 (en)
JP (1) JP2000283569A (en)
KR (1) KR100351599B1 (en)
CN (1) CN1134628C (en)
AU (1) AU766412B2 (en)
DE (1) DE60013666T2 (en)
ES (1) ES2223388T3 (en)
MY (1) MY125343A (en)
SG (1) SG84572A1 (en)
TW (1) TWM267436U (en)

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